Sylvania



(No Model.)

J. B. THOMPSON.

DOOR 011501;. No. 432,958. Patented July 22, 1890.

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UNITE STATES PATENT OFFICE.

JOHN 5. THOMPSON, OF ALLEGHENY, ASSIGNOR TO JAMES H. CURRY, OF

VVILKINSBURG, AND ROBERT A. GILLESPIE, OF ALLEGHENY, PENN- SYLVANIA.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. 432,958, dated July 22, 1890.

Application filed February 13, 1890. Serial No. 340,267. (No model.)

To all whom it may concern:

Be it known that 1, JOHN B. THOMPSON, a citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented or discovered certain new and useful Improvements in Door- Checks, of which improvements the following is a specification.

The invention described herein relates to certain improvements incombined door buffers and checks; and the invention has for its object a construction whereby the opening swing of a door may be stopped without any injurious jar or shock, and whereby the door may be held open in such manner as to prevent any rattling or shaking thereof.

In general terms the invention consists in the construction and combination of mechanical devices or elements, all as morefully hereinafterdescribed and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1 is a sectional view of the female portion of my invention. Fig. 2 shows the arrangement of my improved check upon the door and wall of a room. Fig. 3 shows the arrangement of the check in cases Where the door does not open back parallel with the wall of the room; and Fig. 4 is a sectional view on the line as 00, Fig. 2.

One portion of the check consists of a shell 1, provided at one end with an outwardlyprojecting flange 2, whereby it maybe secured to the wall or door of a room, and at its opposite end with an inwardly-projecting flange 3. A washer 4, of compressible resilient ma terial, as rubber, is placed within the shell 1 against the inwardly-projecting flange 3. This washer, which is preferably made of a diameter equal to the internal diameter of the shell, has the edges of the opening therethrough beveled, as shown in Figs. 1 and 2, the smallest diameter of such hole being less than the diameter of the opening formed by the flange 3. This washer is held up against the flange 3 by a hollow follower or shell 5, fitting within the main shell 1, the opening at the inner end of the inner shell being of a diameter approximately equal to the diameter of the opening in the outer end of the shell 1. The shell or follower 5 and the washer 4 are so proportioned as to the length of one and the thickness of the other relative to the length of the outer shell 1 that the follower 5 will, when the washer is uncompressed, project slightly beyond the shell 1, as shown in Fig. 1. This construction will permit of the compression of the washer by the follower 5 when the shell 1 is secured in operative position,as shown in Fig. 2. As the washer is prevented from radial enlargement by the shell 1,this compression'will effect a reduction of the diameter of the opening through the washer. On the door or other moving part is secured a stud consisting of a double cone-shaped head 6, a neck 7, a stop-plate 8, and screw 9. The head 6 is made of a diameter atits largest part a little less than the diameter of the openings in the outer ends of the shell 1 and follower5,but greater than the diameter of the narrowest part of the opening through the washer 4, so that said head will pass freely through the openings in the shell and follower, but will expand the opening in the washerin passingtherethrough, and therefore the walls of the opening through the washer will, after the passage of the head, contract around the neck. It is preferred to so shape the walls of the opening through the washer that when the latter is compressed said walls will conform to and fit snugly around the neck 7 and against the rear side of the head 6, and the stop-plate 8 is arranged at such a distance from the neck that when the latter is grasped by the washer the plate will bear against the outer end of the shell 1, thereby holding the stud and door firmly in position.

It Will be readily understood that in case of the wearing away of the walls of the open ing in washer liners could be inserted either between the rear end of the follower 5 and the wall or between the front end of the follower and the washer, thereby effecting a greater compression of the washer and consequent contraction of the opening therethrough.

In Fig. 3 is shown the arrangement of the female portion of the check, where the door or other moving part does not swing back parallel with the Wall.

No claim is made herein, broadly, to a spring adapted to engage a headed stud, as it is common to employ a spring formed of Wire bent into a spiral form, the ends of such spiral being connected to form a ring adapted to engage the headed stud. Such a spring is incapable of so fitting around the stem and head of the stud as to prevent any rattling of the door, Whereas a spring formed of rubber or like compressible and resilient material Will closely hug the stud and effectually prevent any rattling. Further, by reason of the employment of a rubber Washer and an adjustable follower the holding-sprjng can be ad- JOHN B. THOMPSON.

Witnesses:

DARWIN S. WoLco'rT, R. H. WHITTLEsEY. 

